from tkinter import*
print("Введите начальную координату, x;")
x=int(input())
print("Введите начальную координату, y:")
y=int(input())
print("Введите начальную координату, n.")
n=int(input())

coords = [0, 0, 10, 0, 10, 10, 20, 10, 20, 20, 10, 20, 10, 30, 0, 30,]
if n == 0 and x>=0 and x<=500 and y>=0 and y<=500:
    pass
else:
    if n > 0 and 0*n+x>=0 and 0*n+y>=0 and 20*n+x<=500 and 20*n+y<=500:
       pass
    else:
        if n < 0 and 20*n+x>=0 and 20*n+y>=0 and 0*n+x<=500 and 0*n+y<=500:
           pass
        else:
            print(" Размер фигуры превышает максимальный размер поля")
            exit()
root = Tk()
root.title("Ит марафон")
root.geometry("500x500")
canvas = Canvas(bg="white", width=500, height=500)
canvas.pack(anchor=CENTER, expand=1)
canvas.create_polygon(coords[0]  *n+x, coords[1]  *n+y,
                      coords[2]  *n+x, coords[3]  *n+y,
                      coords[4]  *n+x, coords[5]  *n+y,
                      coords[6]  *n+x, coords[7]  *n+y,
                      coords[8]  *n+x, coords[9]  *n+y,
                      coords[10] *n+x, coords[11] *n+y,
                      coords[12] *n+x, coords[13] *n+y,
                      coords[14] *n+x, coords[15] *n+y)
root.mainloop()
